CN103601462A - Cement-free mine-tailing concrete grouting material used for power transmission tower base - Google Patents
Cement-free mine-tailing concrete grouting material used for power transmission tower base Download PDFInfo
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- CN103601462A CN103601462A CN201310629141.5A CN201310629141A CN103601462A CN 103601462 A CN103601462 A CN 103601462A CN 201310629141 A CN201310629141 A CN 201310629141A CN 103601462 A CN103601462 A CN 103601462A
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- cement
- grouting material
- mine tailing
- concrete grouting
- transmission tower
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention belongs to the field of concrete grouting materials, and relates to a cement-free mine-tailing concrete grouting material used for power transmission tower base. The provided cement-free mine-tailing concrete grouting material comprises dry-basis materials, water accounting for 13%-15% by mass of the dry-basis materials and a polycarboxylate efficient water reducer accounting for 0.2%-0.5% by mass of the dry-basis materials, wherein the dry-basis materials comprise in percent by mass: 20%-28% of mineral slag ultrafine powder, 12%-17% of steel slag micro powder, 5%-7% of desulfurized gypsum, 1%-3% of calcium carbide slurry and 45%-55% of medium/coarse-grain mine tailing. The provided cement-free mine-tailing concrete grouting material is low in cost and high in properties, helps to reduce emission and save a large amount of portland cement, and helps to solve the difficult problem which badly needs solving during installation of large-scale high-performance power transmission towers and specifically comprises that the performances of the grouting anchored type base are improved with low cost.
Description
[technical field]
The present invention relates to concrete grouting material, specifically relate to a kind of mine tailing concrete grouting material of the non-cement for electric power line pole tower basis.
[background technology]
Along with transmitting line is constantly to maximizing and high performance development, the performance requriements of pole and tower foundation is also being improved constantly.For at good basement rock bare land control shaft tower installation cost and the basic installation quality of raising, generally do not adopt the installation method of large-scale basement rock excavation and casting large concrete foundation, but employing is holed on basement rock and the installation method of the anchoring of being in the milk.Generally adopt at present cement based fine concrete as anchor grouting material, strength grade of concrete is C30 and C40.Along with transmission tower is constantly to maximizing and high performance development, there is the situation that drawing force can not satisfy the demands in this conventional grout material.Be badly in need of strength grade higher, stronger to the bond stress of reinforcing bar, and the grouting material of tool microdilatancy effect.
On the other hand, ordinary Portland cement is per GDP CO
2the high a kind of starting material of discharge intensity.And can replacing part of cement to a certain extent in concrete, the slag micropowder of being made by granulated blast-furnace slag become common recognition.In fact, because calcium/silicon mol ratio in slag is close to 1, and calcium/silicon mol ratio in cement clinker is close to 3.Therefore, slag provide the potential of silicon-oxy tetrahedron be cement clinker 2-3 doubly.But adopt in the past Vertical Mill or the tube mill can only be by slag milling to specific surface area 450m
2/ kg left and right, is equivalent to D90≤30 μ m, D50≤10 μ m.And in cement concrete system, be only less than the ultra tiny slag powders particle of 5 μ m and could be in 28 days 100% participate in hydration reaction.Current Commercial Ore ground-slag is applied to only have an appointment in cement concrete system and 20%～30% can in 28 days, participates in hydration reaction.Recently, the appearance of the large-scale air-flow grinding machine of industrialization supersaturated vapor power, can realize with lower energy consumption slag powders is levigate to specific surface area 800m
2more than/kg, be equivalent to D90≤8 μ m, D50≤3 μ m.And grinding energy and cost and employing vertical mill by slag milling to specific surface area 450m
2/ kg left and right quite.This has just established basic substance for slag micropowders discharges more the potential of silicon-oxy tetrahedron to be provided and to form C-S-H gel in hydration process.
Patent of invention (CN102351492A) the < < high early-strength grouting material of Machine-made Sand microdilatancy and preparation method thereof > >, this invention relates to high early-strength grouting material of a kind of Machine-made Sand microdilatancy and preparation method thereof.Grouting material is comprised of the raw material of following weight percent, and component 1-5%, enhancement component 1-5% are reduced in Machine-made Sand 40-55%, ordinary Portland cement 40-55%, expansion; It is high-alumina cement and anhydrite by 0.5-1.5 that component is reduced in described expansion: 1 composite the forming of weight ratio, and enhancement component is polycarboxylate water-reducer dry powder and silicon ash by 0.05-0.15: 1 weight ratio mixes; During preparation, said components is carried out to two-stage and be dry mixed, make the grouting material of this invention.This invention product has that early strength is high, microdilatancy is without excellent properties such as contractions, can be widely used in the aspects such as reinforcing of beam, plate, post and the terrace of foot bolt fastening, back-grouting that equipment is installed and buildings, and range of application is wider.But the high-alumina cement adopting in this invention is all the starting material of high several times and tens times of cost ratio ordinary Portland cement as enhancement component as microdilatancy component and silicon ash, and main bonding component is ordinary Portland cement, fine aggregate is Machine-made Sand, therefore cause this grouting material production cost higher, be not suitable for extensive pole and tower foundation and install and use.Ordinary Portland cement ratio, up to 40%-55%, does not meet the whole world and reduces discharging CO in addition
2with energy-conservation development trend.Patent of invention (CN101921086A) < < cement-based ultra-high strength contraction-free grouting concrete > >, this invention proposes a kind of cement-based ultra-high strength contraction-free grouting concrete, by cement, quartz sand, water reducer, swelling agent, defoamer, anti-settling agent, steel fiber, retardant, water-holding agent forms, each components in mass portion is counted proportioning: 100 parts of cement, 5～10 parts of swelling agents, 50～100 parts of quartz sands, 0.5～2.5 part of water reducer, 0.3～1.0 part of defoamer, 0.1～0.3 part of anti-settling agent, 5～30 parts of steel fibers, 0～1.0 part of retardant, 0.1～0.3 part of water-holding agent.This beneficial effect of the invention is: more than (1) brings up to 70MPa by the ultimate compression strength of 1d under cement-based grouting material normal temperature; (2) more than the ultimate compression strength of 28d under cement-based grouting material normal temperature is brought up to 120MPa; (3) this cement-based ultra-high strength shrinking-free grouting material can be used for large-scale, superhuge Equipment Foundations and installs, and the occasion such as the bolt anchoring that injection material ultimate compression strength is had relatively high expectations, structural strengthening, pavement patching.This invention is owing to having been used the high price starting material of several ten thousand yuan/ton of steel fiber, aerosils etc., and production cost is higher, is more not suitable for large-scale pole and tower foundation and installs and uses.Therefore in addition in this material filling, still contain the ordinary Portland cement of vast scale, still can not solve few use and without the difficult problems of cement clinker and energy-saving and emission-reduction.
[summary of the invention]
In order to overcome the deficiencies in the prior art, the fine aggregate grouting material that the invention provides a kind of low cost, performance is high and cement grog 100% does not adopt solid waste, for the grouting anchor foundation of good basement rock bare land electric power line pole tower.
For achieving the above object, the present invention is by the following technical solutions:
The invention provides a kind of non-cement mine tailing concrete grouting material for transmission tower basis, by mixture butt material, water and water reducer, formed, cement grog not in mixture wherein, all adopt industry and mining industry solid waste, comprise slag micropowders, slag micro powder, desulfurated plaster, calcium carbide mud, middle coarse grain mine tailing.
A kind of non-cement mine tailing concrete grouting material for transmission tower basis provided by the invention, wherein, mixture is by slag micropowders 20%-28%, slag micro powder 12%-17%, desulfurated plaster 5%-7%, calcium carbide mud 1%-3%, middle coarse grain mine tailing 45%-55% forms.Slag micropowders specific surface area is 800-900m
2/ kg, obtains by the large-scale airflow milling of supersaturated vapor power is machine-processed.
A kind of non-cement mine tailing concrete grouting material for transmission tower basis provided by the invention, wherein, slag micro powder specific surface area is 400-500m
2/ kg, the steel tailings by the vexed method pre-treatment of heat after by the most of metallic iron of blanking grinds and makes.
A kind of non-cement mine tailing concrete grouting material for transmission tower basis provided by the invention, wherein, desulfurated plaster is for take coal-fired flue gas desulfurization gypsum or the relieving haperacidity waste-gas desulfurization gypsum that terra alba or calcium sulphate hemihydrate be main component; Calcium carbide mud is for adopting calcium carbide to produce the industrial residue producing in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in metal mine ore dressing process.
The middle coarse grain mine tailing that in the present invention, mixture adopts, meets the part of GB/T14684-2001 building sand standard.
A kind of non-cement mine tailing concrete grouting material for transmission tower basis provided by the invention, wherein water accounts for the 13%-15% of mixture butt quality, water reducer accounts for the 0.2%-0.5% of mixture butt quality of material, water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, and above-mentioned material proportion is pressed butt mass percent and calculated.
Non-cement mine tailing concrete grouting material provided by the invention is a kind of fine aggregate grouting material of 100% employing solid waste, for the grouting anchor foundation of good basement rock bare land electric power line pole tower.This grouting material is usingd middle coarse grain mine tailing and is replaced natural sandstone as fine aggregate, usings slag micropowders, slag micro powder, desulfurated plaster and the calcium carbide mud main component as gelling material.Wherein slag micro powder is as main microdilatancy component, the collaborative forming process of ettringite and C-S-H gel is as auxiliary expansion sources, give full play to slag micropowders and there is the potential that silicon-oxy tetrahedron and formation C-S-H gel are provided doubly than the high 2-3 of cement clinker, form high performance grouting material, for the grouting anchor foundation of electric power line pole tower.
After the mixture batching that the present invention is adopted stirs, gained slurry has Self-leveling performance.Slurry is filled in the boring of having constructed in advance, before perfusion, needs by engineering design plan (EDP) reserved steel bar and bolt in boring.After slurry sclerosis, within 3-28 days, can carry out shaft tower installation.
Non-cement mine tailing concrete grouting material provided by the invention, slurry body pours into after boring, and there is aquation in the residual f-CaO in slag and f-MgO, produces respectively approximately 98% and 148% volumetric expansion.But due to f-CaO residual in the vexed method slag of heat and f-MgO seldom, and slag is by superfine pulverizing, so its expansion is dispersed, and shows just microdilatancy on the overall volume after slurry sclerosis.In slag also can there is hydration reaction in the rich magnesium RO phase particle of superfine particle part on a small quantity in addition, and microdilatancy is made to extra contribution.On the other hand, hot vexed method slag is converted into Ca(OH by most of f-CaO and f-MgO in preprocessing process)
2and Mg(OH)
2, these components play active effect by the pozzolanic activity reaction to activated slag.And C in slag
2s and C
3the aquation of S can produce C-S-H gel, and grouting body intensity is produced to contribution, also continues to discharge Ca(OH simultaneously)
2, as the reactant of slag micropowders volcano active reaction.The desulfurated plaster adding can promote following reaction to carry out:
（1）4H
3AlO
2 4 -+6CaO
2++6CaSO
4·2H
2O+4OH
-+44H
2O→2(3CaO·Al
2O
3·3CaSO
4·32H
2O)
H in its Chinese style (1)
3alO
4 2-it is main that by slag micropowders, the continuous dissolving in basic solution provides.And the hydrated product of slag and calcium carbide mud can provide C endlessly
a 2+and OH
-.Formation in formula (1) reaction is ettringite.At saturated Ca(OH)
2in solution, ettringite has extremely low solubleness and ionic product, itself and H
3alO
4 2-equilibrium concentration than slag micropowders and H
3alO
4 2-dissolution equilibrium concentration low tens times.Therefore, the continuous formation of ettringite just can constantly be broken the H in slag micropowders and solution
3alO
4 2-dissolution equilibrium, promote that the aluminum oxide in slag micropowders constantly dissolves, and ettringite constantly forms.On the other hand, in slag, aluminum oxide all exists with aluminum-oxygen tetrahedron form, and connects into glass network body with silicon-oxy tetrahedron.Therefore, the stripping of aluminum-oxygen tetrahedron must make the vitreum network on slag surface constantly dissociate, and discharges a large amount of highly active silicon-oxy tetrahedrons or silicon-oxy tetrahedron group.Their understand the Ca fast and in solution
2+reaction forms C-S-H gel.Therefore, the aquation of slag micropowders and the symplastic growth of C-S-H gel and ettringite have greatly been promoted adding of desulfurated plaster.Due to the fast synergistic growth that has promoted C-S-H gel and ettringite under the drive in formula (1) reaction, cause the fast hydration of slag and the rapid growth of grouting body intensity, given full play to slag micropowders simultaneously and can provide the potential of 2-3 times silicon-oxy tetrahedron than cement clinker more.In addition, the formation of more ettringite has also been played positive contribution to the microdilatancy of grout hardens body.Therefore, in the present invention, the premium properties such as the high strength after grouting material hydration and hardening and microdilatancy is that various solid wastes reacts to each other, synergistic result.
Compared with prior art, the present invention has following excellent effect:
(1) non-cement mine tailing concrete grouting material provided by the invention, 100% utilizes solid waste preparation, has solved large-scale high-performance electric power line pole tower and the raising grouting anchoring type basic property of urgent need solution has been installed and is kept a difficult problem cheaply;
(2) non-cement mine tailing concrete grouting material provided by the invention has high-performance, and strength grade is higher, stronger to the bond stress of reinforcing bar, and tool microdilatancy effect;
(3) non-cement mine tailing concrete grouting material provided by the invention, cement, does not compare with existing other strength cement-based grouting material with existing Portland cement base fine concrete, has saved a large amount of silicate cements, reduces discharging CO
2;
(4) non-cement mine tailing concrete grouting material provided by the invention, makes full use of reacting to each other and acting synergistically between various solid waste, has promoted the high value added utilization of solid waste.
[embodiment]
Embodiment 1
The proportioning that the present embodiment grouting material is pressed butt mass percent is as follows: slag micropowders 25%, slag micro powder 12%, desulfurated plaster 7%, calcium carbide mud 1%, middle coarse grain mine tailing 55%, the additional high-efficiency water-reducing agent of poly-carboxylic acid that accounts for the water of butt quality of material 14% and account for butt quality of material 0.3%.After above-mentioned batching is stirred, gained slurry has Self-leveling performance.Slurry is filled in the boring of having constructed in advance, before perfusion, presses engineering design plan (EDP) reserved steel bar and bolt in boring.Slurry hardens and within latter 3 days, carries out shaft tower installation.Slag micropowders is the slag micropowders that the large-scale air-flow grinding machine of supersaturated vapor power grinds, and specific surface area is 900m
2/ kg; Slag micro powder is the slag micro powder that the steel tailings after hot vexed method pre-treatment and after the most of metallic iron of blanking grinds, and specific surface area is 410m
2/ kg; Desulfurated plaster is for take the coal-fired flue gas desulfurization gypsum that terra alba is main component.Calcium carbide mud is for adopting calcium carbide to produce the industrial residue producing in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in magnetite quartzite sections mine ore dressing process, and the part that meets GB/T14684-2001 building sand standard that obtains of classified machining.The salient features of gained grouting material is in Table 1.
The salient features of table 1 grouting material
Embodiment 2
The proportioning that the present embodiment grouting material is pressed butt mass percent is as follows: slag micropowders 24%, slag micro powder 13%, desulfurated plaster 7%, calcium carbide mud 3%, middle coarse grain mine tailing 53%, the additional high-efficiency water-reducing agent of poly-carboxylic acid that accounts for the water of butt quality of material 13% and account for butt quality of material 0.3%.After above-mentioned batching is stirred, gained slurry has Self-leveling performance.Slurry is filled in the boring of having constructed in advance, before perfusion, presses engineering design plan (EDP) reserved steel bar and bolt in boring.Slurry hardens and within latter 5 days, carries out shaft tower installation.Slag micropowders is the slag micropowders that the large-scale air-flow grinding machine of supersaturated vapor power grinds, and specific surface area is 880m
2/ kg, slag micro powder is the slag micro powder that the steel tailings after hot vexed method pre-treatment and after the most of metallic iron of blanking grinds, specific surface area is 430m
2/ kg; Desulfurated plaster is for take the coal-fired flue gas desulfurization gypsum that terra alba is main component.Calcium carbide mud is for adopting calcium carbide to produce the industrial residue producing in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in magnetite quartzite sections mine ore dressing process, and the part that meets GB/T14684-2001 building sand standard that obtains of classified machining.The salient features of gained grouting material is in Table 2.
The salient features of table 2 grouting material
Embodiment 3
The proportioning that the present embodiment grouting material is pressed butt mass percent is as follows: slag micropowders 28%, slag micro powder 17%, desulfurated plaster 7%, calcium carbide mud 3%, middle coarse grain mine tailing 45%, the additional high-efficiency water-reducing agent of poly-carboxylic acid that accounts for the water of butt quality of material 15% and account for butt quality of material 0.4%.After above-mentioned batching is stirred, gained slurry has Self-leveling performance.Slurry is filled in the boring of having constructed in advance, before perfusion, needs by engineering design plan (EDP) reserved steel bar and bolt in boring.Slurry hardens and can carry out shaft tower installation in latter 3 days.Slag micropowders is the slag micropowders that the large-scale air-flow grinding machine of supersaturated vapor power grinds, and specific surface area is 890m
2/ kg; Slag micro powder is the slag micro powder that the steel tailings after hot vexed method pre-treatment and after the most of metallic iron of blanking grinds, and specific surface area is 490m
2/ kg; Desulfurated plaster is for take coal-fired flue gas desulfurization gypsum or the relieving haperacidity waste-gas desulfurization gypsum that terra alba or calcium sulphate hemihydrate be main component.Calcium carbide mud is for adopting calcium carbide to produce the industrial residue producing in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in magnetite quartzite sections mine ore dressing process, and the part that meets GB/T14684-2001 building sand standard that obtains of classified machining.The salient features of gained grouting material is in Table 3.
The salient features of table 3 grouting material
From above-mentioned data, various embodiments of the present invention ultimate compression strength, High anti bending strength, grout hardens body is high to the cohesive strength of reinforcing bar, represents that bond stress is strong.
According to specific exemplary embodiment, invention has been described herein.It will be apparent under not departing from the scope of the present invention, carrying out to one skilled in the art suitable replacement or revise.Exemplary embodiment is only illustrative, rather than the restriction to scope of the present invention, and scope of the present invention is defined by appended claim.
Claims (13)
1. for the non-cement mine tailing concrete grouting material on transmission tower basis, by mixture, water and water reducer, formed, it is characterized in that not cement grog of described mixture; Described mixture is industry and mining industry solid waste.
2. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 1, is characterized in that described mixture comprises slag micropowders, slag micro powder, desulfurated plaster, calcium carbide mud and middle coarse grain mine tailing.
3. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 2, it is characterized in that described mixture is by slag micropowders 20%-28%, slag micro powder 12%-17%, desulfurated plaster 5%-7%, calcium carbide mud 1%-3%, middle coarse grain mine tailing 45%-55% forms, and above-mentioned material proportion is pressed butt mass percent and calculated.
4. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 1, is characterized in that described slag micropowders specific surface area is 800-900m
2/ kg.
5. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 4, is characterized in that described slag micropowders obtains by the large-scale airflow milling of supersaturated vapor power is machine-processed.
6. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 1, is characterized in that described slag micro powder specific surface area is 400-500m
2/ kg.
7. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 6, is characterized in that the steel tailings after by the most of metallic iron of blanking grinds and makes described slag micro powder by the vexed method pre-treatment of heat.
8. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 2, is characterized in that described desulfurated plaster is for take coal-fired flue gas desulfurization gypsum or the relieving haperacidity waste-gas desulfurization gypsum that terra alba or calcium sulphate hemihydrate be main component.
9. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 2, is characterized in that described calcium carbide mud is for adopting calcium carbide to produce the industrial residue producing in acetylene gas process.
10. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 2, is characterized in that described middle coarse grain mine tailing is the fine-grained solids waste of discharging in metal mine ore dressing process.
11. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 1, is characterized in that described water accounts for the 13%-15% of mixture butt quality.
12. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 1, is characterized in that described water reducer accounts for the 0.2%-0.5% of mixture butt quality of material.
13. a kind of non-cement mine tailing concrete grouting material for transmission tower basis as claimed in claim 12, is characterized in that described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
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|---|---|---|---|
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|---|---|---|---|
| CN201310629141.5A CN103601462B (en) | 2013-11-29 | 2013-11-29 | A kind of non-cement mine tailing concrete grouting material for transmission tower foundation |
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| CN104446328A (en) * | 2014-11-04 | 2015-03-25 | 河北金泰成建材股份有限公司 | Method for producing premixed pump-delivered high-property concrete by jointly using variety of solid wastes |
| CN106316312A (en) * | 2015-06-15 | 2017-01-11 | 新疆宇鑫混凝土有限公司 | Clinker-free cement concrete prepared by using building garbage micro-powder |
| CN106495581A (en) * | 2016-10-31 | 2017-03-15 | 华北水利水电大学 | Grouting material that reinforces for road and preparation method thereof |
| CN107915435A (en) * | 2017-11-28 | 2018-04-17 | 中国建筑材料科学研究总院有限公司 | The fast gravity die bar connecting sleeve grouting material of low-temperature-sensitive seif-citing rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107915435A (en) * | 2017-11-28 | 2018-04-17 | 中国建筑材料科学研究总院有限公司 | The fast gravity die bar connecting sleeve grouting material of low-temperature-sensitive seif-citing rate |
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| CN103601462B (en) | 2015-08-05 |
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